This study aims to determine students' perceived impact of grammar
competence in speaking, the challenges of applying grammar in speaking, and
contributing factors that support the ability to apply grammar in speaking. This
research method used convergent mixed-methods design. The data of this study was
obtained from tests, interviews, and observations. This study was conducted in
Darul Hijrah Islamic Boarding School for Female. The subject of this research was
the students of eleventh grade. To determine the impact that grammar has on
speaking, students' understanding of grammar was tested along with their speaking
ability. The English teacher was also interviewed to verify several pieces of
information. The study results showed that the scores of both grammar and speaking
tests are not equal, where their grammar is better than speaking. However, though
they can still speak without understanding grammar, they recognize that grammar
positively impacts them. Students also faced several challenges in applying
grammar in speaking, such as; the influence of their first language, facilities in
school, context of learning, lost interest in studying. However, the students also
have some contributing factors that encourage the ability to apply grammar in their
speaking as well as; students’ ambitions and situations.